Where is this limit set?
It's limited by our blockchain
There is no such a limit in your blockchain.
Yes, it is
No, there is not:
https://github.com/CashberyCoin/cashberycoin/blob/master/src/main.h#L55
https://github.com/CashberyCoin/cashberycoin/blob/master/src/main.cpp#L1020
Kindly check this screenshot https://i.gyazo.com/78044e8b857be06cdfbbaba91e8a7f0a.png
This is a common mistake by "developers" who don't really know what they are doing. They think the above line limits the total supply. But it does not. All it is used for is a sanity check for transaction creation.